Fix migration

htdocs/install/mysql/migration/10.0.0-11.0.0.sql

@@ -28,6 +28,10 @@
 -- Note: fields with type BLOB/TEXT can't have default value.
 
 
+-- Missing in v10
+ALTER TABLE llx_account_bookkeeping ADD COLUMN date_export datetime DEFAULT NULL;
+
+
 create table llx_entrepot_extrafields
 (
   rowid                     integer AUTO_INCREMENT PRIMARY KEY,
@@ -50,3 +54,4 @@ ALTER TABLE llx_user ADD COLUMN iplastlogin         varchar(250);
 ALTER TABLE llx_user ADD COLUMN ippreviouslogin     varchar(250);
 
 ALTER TABLE llx_events ADD COLUMN prefix_session varchar(255) NULL;
+